[pk18]

Originally Posted by sryanbruen

Thanks to Donegal Storm giving me an excel file of many Irish stations' every 25.0c+ day since their records began. It has allowed me further to compile my list that I made ages ago of the highest absolute maximum temperature in Ireland for every year as far back as possible. Using this file, I have been able to go back to 1961. I cannot guarantee that these are the highest of some of the years but they're the highest out of the file. If any higher maximums are found, it will be updated. I have also updated some of the years that I had previously on the list because I discovered higher maximum temperatures than what MÉ's weather bulletins have showed in that file.

Been busy doing this and also updating the Irish heatwaves excel file with more stations.

2018: 32.0°C at Shannon Airport on June 28th
2017: 28.4°C at Phoenix Park on June 21st
2016: 30.4°C at Mount Dillon on July 19th
2015: 26.1°C at Dublin (Glasnevin) on June 30th
2014: 28.8°C at Durrow on July 25th
2013: 31.0°C at Dooks on July 19th
2012: 28.3°C at Ardfert (Liscahane) on May 25th
2011: 26.0°C at Cavan (Drumconnick) & Athy (Chanterlands) on June 3rd
2010: 27.1°C at Elphin on May 22nd and Ardee (Boharnamoe) on May 23rd
2009: 28.6°C at Galway (University College) on June 2nd
2008: 25.9°C at Ardtamon on July 27th and Cork (Clover Hill) on July 28th
2007: 27.0°C at Dooks on June 9th and Cavan (Drumconnick) on June 11th
2006: 32.3°C at Elphin on July 19th
2005: 30.3°C at Kildalton on July 12th
2004: 27.3°C at Birr on August 1st
2003: 30.4°C at Boora on August 8th
2002: 26.5°C at Cavan (Drumconnick) on August 5th
2001: 28.4°C at Ardee (Boharnamoe) on July 28th
2000: 28.5°C at Cavan (Drumconnick) on June 18th
1999: 28.0°C at Warrenstown and Athy (Chanterlands) on July 9th
1998: 26.7°C at Cork (Clover Hill) on August 8th
1997: 28.4°C at Ardfert on May 31st
1996: 27.0°C at Ardfert (Liscahane) and Shannon Airport on June 16th, Kilfinnane Education Centre and Killarney (Muckross Hse.) on June 17th
1995: 30.8°C at Kilkenny on August 2nd
1994: 26.8°C at Portlaoise (Coolnamona) on August 1st
1993: 28.6°C at Cork (Clover Hill) on June 27th
1992: 27.3°C at Cork (Clover Hill) on June 27th
1991: 28.4°C at Cahirciveen on September 5th
1990: 31.0°C at Dublin (Glasnevin) on August 2nd
1989: 30.5°C at Lanesboro (Doire Dharog) on July 19th
1988: 26.0°C at Dungarvan (Carriglea) on June 23rd
1987: 29.0°C at Waterford Airport on July 5th
1986: 27.0°C at Clonsast (Bord na Móna) on June 27th
1985: 25.1°C at Dublin (Merrion Square) on July 2nd & September 30th
1984: 27.9°C at Cork (Clover Hill) on July 27th
1983: 32.2°C at Carlow (Oak Park) on July 14th
1982: 27.0°C at Glencolumbkille (Drimroe) on June 4th
1981: 26.2°C at Cork (Clover Hill) on August 25th
1980: 26.5°C at Enniscorthy (Voc. Sch.) on August 20th
1979: 25.8°C at Enniscorthy (Voc. Sch.) on July 16th & 17th, Ballybrittas on July 27th and Dublin (Glasnevin) on July 28th
1978: 26.5°C at Boora on May 31st
1977: 28.7°C at Ballybrittas on July 7th
1976: 32.5°C at Boora on June 29th
1975: 31.5°C at Ballybrittas on August 3rd
1974: 28.0°C at Thurles (Sugar Factory) on August 25th
1973: 28.7°C at Boora on August 15th
1972: 28.7°C at Killarney (St. Finans Hosp.) on July 19th
1971: 26.9°C at Enniscorthy (Voc. Sch.) on July 8th
1970: 27.9°C at Warrenstown on June 10th
1969: 29.6°C at Fermoy (Moore Park) on July 15th
1968: 26.6°C at Tuam (Airglooney) on June 12th
1967: 26.4°C at Ballybrittas on June 17th
1966: 26.2°C at Ballincurra on July 22nd
1965: 25.2°C at Ballybrittas on June 29th
1964: 26.0°C at Ballybrittas on August 3rd
1963: 26.8°C at Dublin (Rathfarnham Castle) on July 30th
1962: 25.0°C at Clonsast (Bord na Móna) on June 8th
1961: 28.4°C at Gurteen (Agr. Coll.) on September 1st

Data comes from Met Éireann.

I have checked stations from MÉ's historical database for maximum temperatures above 25°C and minimum temperatures below -5°C to find the highest maximums and lowest minimums for each year. In most cases they are the same, but I have found some higher temperatures:
2019: 29.8°C at Ardfert (Liscahane) on June 27th
2017: 28.6°C at Phoenix Park on June 21st
2008: 25.9°C at Ardtamon on July 28th and Cork (Clover Hill) on August 28th
2004: 28.2°C at Adare Manor on August 2nd (also 27.6°C at Edenderry (Ballinla) on August 2nd, 27.5°C at Cahore (Kilmichael House) on June 14th and at Athy (Chanterlands) on August 2nd, 27.3°C at Birr or August 2nd)
1999: 28.0°C at Warrenstown and Athy (Chanterlands) on July 9th, at Craggaunowen on July 31st
1995: 31.5°C at Carlow (Oak Park) on August 2nd
1993: 26.1°C at Boora on June 28th (I am a bit suspicious of 28.6°C at Cork (Clover Hill) on June 27th and other readings at this station, 9 days above 25°C at this station this year, although Ballinacurra No 2 shows as recording 27.6°C on June 27th but the next highest on this date is 25.5°C at Dunsany (Grange). Cork (Clover Hill) also shows as recording 26.6°C on July 3rd and 26.2°C on July 22nd, the Boora figure looks the most reliable.
1992: 26.5°C at Derrygreenagh on June 29th (I am a bit suspicious of 27.3°C at Cork (Clover Hill) on June 27th too, next highest on June 27th was 25.2°C at Rathluirc (For.Stn.). See further details for maxima during this period at Cork (Clover Hill) below.
1987: 27.3°C at Dublin (Phoenix Park) on August 16th (I am suspicious of the 1987 maxima at Waterford Airport of 29.0°C on July 5th and 28.8°C on July 6th. Next highest on 5th was 26.9°C at Dublin (Phoenix Park) and on 6th 25.2°C at Navan (Tara Mines), while on August 16th Glasnevin and Merrion Square both recorded 26.9°C at Dublin (Phoenix Park) and Dublin Airport recorded 26.6°C.
1985: 25.9°C at Valentia Observatory on September 28th (also 25.6°C at Casement on July 4th)
1982: 27.0°C at Glencolumbkille (Drimroe) on June 4th and Kilkenny on August 3rd
1974: 26.5°C at Ballyvaughan on June 21st (not including 28.0°C at Thurles (Sugar Factory) on August 25th

Also some Winter maxima in 1992 and 1993 at Cork (Clover Hill) look extremely high. In 1992, Cork (Clover Hill) also shows as recording 16.7°C on January 5th and 6 days above 17°C in February 1992, 3 days above 21°C in March, 6 days above 18°C in November and 19°C on December 13th 1992. In 1993 the station shows as recording 19.0°C on January 17th, 18.0°C on January 2nd, 17.8°C on January 28th, 17.5°C on January 19th, 17.9°C on February 12th, 17.5°C on February 9th, 17.4°C on February 3rd and 17.0°C on February 7th, 18.8°C on December 18th, 17.5°C on December 2nd and 17.4°C on December 17th

[sryanbruen]

-0.7C at Casement yesterday is a new September record for the station beating -0.3C on 8 September 1972.

Mullingar bet its September record again with -1.7C. -1.6C was the previous record on 29 September 2018.

[pauldry]

February 1992 was indeed very warm.

I didnt look at temperatures much then but it was 15 or 16c a lot of days for nearly a week like you say.

I remember being at the beach and someone said it was 17c that day.

[compsys]

Originally Posted by sryanbruen

-0.7C at Casement yesterday is a new September record for the station beating -0.3C on 8 September 1972.

Mullingar bet its September record again with -1.7C. -1.6C was the previous record on 29 September 2018.

It is somewhat bizarre that we're recording these record lows given the warming climate. Only in Ireland.

Global warming seems very apparent in Ireland in the winter and early spring months but almost non-existent in the summer and autumn ones.

However, my understanding is that the Mullingar station was moved a few years ago to a colder location so are long-term comparisons correct (even though it's all we have). Dublin Airport was moved to a much colder location a few years ago too and almost every second month has a monthly mean temp below its LTA.

I think Markee Castle must have been moved too, as it too seems to record a large number of months below its LTA.

I don't think Casement has been moved so its record seems justified.

[sryanbruen]

Originally Posted by Slieve Gullion

I believe you try very hard but simply I do not believe those numbers, highs or lows.

Temperatures over 35c here in the midwest in the summer 18 without a doubt. Lahinch on June 31st according to the public temp gauge display read 38c. I was there and it was the hottest place I had been since I was in Seville in August a few years ago.

Cavan recorded -19c in the that very cold 3 week snap we had a decade ago. I recorded -16 here myself in the suburbs of Limerick in that cold spell. "Lies, damned lies, and statistics"

I don't think those lists give an accurate reflection or are overall definitive figures to suggest with any certainty that they are correct and truly accepted. I don't think they stand up. There simply are not enough weather stations.

Well regardless if you believe them or not, they are the official numbers recorded by the limited stations we have in our network and I will only use official station data - will disregard if official mets' say so. There will always be a certain margin of error to a degree we must keep in mind even if our network was more extensive than the one we have right now.

I do this for a passion and for mistakes or quality checks noted by pk18, I am not a professional. I do this for interest sakes and do not triple check on if something is 100% correct or looks odd. I simply do not have the time to do so.

Originally Posted by pk18

According to met Eireann historical data -8.8c was recorded at Ballybrittas on 2nd April 1969. I assume this is incorrect.

Yes, the minimum temperature records are shown on met.ie.

Originally Posted by compsys

It is somewhat bizarre that we're recording these record lows given the warming climate. Only in Ireland.

Global warming seems very apparent in Ireland in the winter and early spring months but almost non-existent in the summer and autumn ones.

However, my understanding is that the Mullingar station was moved a few years ago to a colder location so are long-term comparisons correct (even though it's all we have). Dublin Airport was moved to a much colder location a few years ago too and almost every second month has a monthly mean temp below its LTA.

I think Markee Castle must have been moved too, as it too seems to record a large number of months below its LTA.

I don't think Casement has been moved so its record seems justified.

Yes, I told you about the Mullingar relocation to a colder location back in May when it recorded a new May low temperature record. I have not noticed too much of a cooling impact from its relocation to warrant not comparing anymore on my own merit. Dublin Airport though is a different kettle of fish, I have stopped doing so for a while now with its temperature. Its current 30-year averages are not comparable at all and totally irrelevant.

[Gaoth Laidir]

Originally Posted by Slieve Gullion

I believe you try very hard but simply I do not believe those numbers, highs or lows.

Temperatures over 35c here in the midwest in the summer 18 without a doubt. Lahinch on June 31st according to the public temp gauge display read 38c. I was there and it was the hottest place I had been since I was in Seville in August a few years ago.

Cavan recorded -19c in the that very cold 3 week snap we had a decade ago. I recorded -16 here myself in the suburbs of Limerick in that cold spell. "Lies, damned lies, and statistics"

I don't think those lists give an accurate reflection or are overall definitive figures to suggest with any certainty that they are correct and truly accepted. I don't think they stand up. There simply are not enough weather stations.

I can't believe you're disregarding official readings in favour of your own estimation or a public temperature display. It was not 35 and definitely not 38, unless you're talking about in a suntrap back garden. Leave a thermometer on a table and you can get maybe 50 degrees. Does that mean it's real? No. These street thermometers or those outside pharmacies are measuring the temperature inside a black box sitting in direct sunshine above a heated tarmac or concrete surface and against a concrete wall. If that were the standard of global meteorological records then we couldn't make any inference or comparisons of longterm trends. There are already enough questionable gaps in datasets being artificially filled in without introducing the totally uncontrollable variation of non-standard instrumentation or siting.

[sryanbruen]

For interest, these are the Halloween records for Ireland at synoptic and or climate stations.

[sryanbruen]

As you know, it won't be long now (just over a week when the first snowfalls were observed) until the 10th anniversary of the November/December 2010 cold spells in Ireland. I have spoken time and time again about these of course with all kinds of posts done in the past, none of which I find very good at this point.

That big post I did in particular a long while ago on the period was a big mess with some misinformation and more research was needed. The tables I created were also extremely amateurish.

Why you have been seeing a big decrease in my posts on stats is not only down to life reasons or interest, it's also the fact that I want my content to be well researched, in-depth and detail packed as can be whilst being concise at the same time which my old posts did not succeed in. A lot of those old posts contained an awful amount of rambling and nonsensical facts or trivia that hold no relevance.

My most recent project I took on was a preliminary report of Irish weather during Spring 2020 based on synoptic station data and was quite different to previous projects I carried out whilst being familiar as it illustrated a similar layout/flow to recent Met Éireann weather event reports.

I wanted to do the same as an anniversary report for my favourite weather moment I have observed but time has been a limiting factor. I have planned a large amount of "on this day" and stat related posts on Twitter but I don't think it'd be wise to post them all here and do not want to make this look like I am soapboxing again.

Always feel there's something new to learn about something even if it's an area (or in this case a time) one has investigated so much as I have with 2010.